Concept check: Which loop checks its condition before executing the body?
Choose an option to check your answer.
Correct Answer: C. While loop
Explanation:
A while loop evaluates its condition before each iteration.
MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
Concept check: What is an operating system?
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Correct Answer: D. Software that manages hardware and provides services to programs
Explanation:
An operating system coordinates hardware resources and applications.
Concept check: Which number system uses digits 0 through 7?
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Correct Answer: A. Octal
Explanation:
The octal system has base 8 and uses digits 0–7.
Concept check: Which HTML element is commonly used for the largest heading?
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Correct Answer: B
Explanation:
The h1 element represents the highest-level heading.
Concept check: What is a computer network?
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Correct Answer: C. A group of connected devices that exchange data
Explanation:
A network connects devices so they can communicate and share resources.
Concept check: Which sorting algorithm repeatedly swaps adjacent out-of-order elements?
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Correct Answer: D. Bubble sort
Explanation:
Bubble sort compares adjacent pairs and swaps them until ordered.
Concept check: What does a bit store?
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Correct Answer: A. One binary value
Explanation:
A bit stores either 0 or 1.
Concept check: How many bits are in one byte?
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Correct Answer: B. 8
Explanation:
A byte conventionally contains eight bits.
Applied reasoning: What is the binary representation of decimal 10?
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Correct Answer: C. 1010
Explanation:
Decimal 10 equals 8 + 2, giving binary 1010.
Concept check: What is the purpose of a compiler?
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Correct Answer: D. Translate source code into another executable or lower-level form
Explanation:
A compiler translates source code before execution.
Concept check: Which database key uniquely identifies a record?
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Correct Answer: A. Primary key
Explanation:
A primary key uniquely identifies each table row.
Concept check: What does URL identify?
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Correct Answer: B. The address of a resource on a network
Explanation:
A URL locates a resource such as a web page.